Serum PLI Measurement Serum was collected within 6–12 hours of admission and stored at 2–8°C for up to 3 days before analysis. Two validated ELISAs were used for determination of the PLI.12, 13 Before 2006, an in‐house assay was utilized (2.2–102.1 μg/L is normal; >200 μg/L is consistent with pancreatic injury)12; after 2006, a commercial ELISA4 was used (0–200 μg/L is normal; 200–400 μg/L is “grey range”; >400 μg/L is consistent with pancreatic injury).13 A PLI >200 μg/L (before 2006) and 400 μg/L (after 2006) respectively was considered indicative of pancreatic injury (PLIpos); results below these levels were considered not supportive of pancreatic injury (PLIneg).